carbon paper

carbon-paper的词性：
n.（名词）

1. A lightweight paper coated on one side with a dark waxy pigment, placed between two sheets of blank paper so that the bottom sheet will receive a copy of what is typed or written on the top sheet.
复写纸：一种轻薄的纸。纸张的一面涂有深色蜡质涂料。把复写纸放在两张空白纸页之间，在最上面那张纸上用打字机打出或手写出的东西可在下面那张纸上得到